If Bai Song is not mistaken, the elevator that the two of them took this time was the one they took last time they went down, but the elevator attendant inside became a woman.

This in itself is really problematic. With the flow of people in this hospital, there is no need for all four elevators to be equipped with elevator personnel. Two are equipped, and the other is not equipped, but the optimal solution.

Therefore, the last time I came, Bai Song always felt that there was a problem, and this time I basically found it, but I can't be sure yet.

There were still a lot of people on the first floor, and the two slowly left the hospital, got into the car, and Bai Song took a deep breath.

"There is really something wrong with this hospital", Bai Song muttered again: "It can be equipped with four elevator staff, but no one charges parking fees." ”

"It does feel like something is wrong right now, but there's not too direct evidence yet. Liu Shuyuan rubbed his temples and was thinking about how to arrange it next.

"I think the laboratory is not the 10th floor, this 10th floor is fake, it is very likely that your elevator will stop on the 9th floor at this level. Bai Song said.

"In this way, the lab is actually on the 9th floor, with two floors between the 7th floor. What we call 13 floors is actually 12 floors. Liu Shuyuan sat in the back of the car and observed the building through the window glass.

This window glass is also one-way, with film, so you can't see the inside from the outside, but Liu Shuyuan still has a feeling that he can be seen.

The hospital itself is a little gloomy, and thinking of the unknown things behind this, Liu Shuyuan can feel extremely cool. But on the other hand, there is a raging fire burning in his heart, and he can't wait to know the secret.

"We always feel like someone is going to pay attention to us. Liu Shuyuan said: "Do we want to go back and change the car?"

"It's okay, we won't be here after that. Bai Song drove out of the hospital and parked in an open space near the prison.

There are also a couple of cars waiting here, and there's a police car.

Bai Song's red flag is particularly conspicuous, just about to stop, two policemen surrounded him, Bai Song said troublesome---- the two of them have been disguised, and the documents do not match. The main thing is that there are not all police around, it is very troublesome to explain, and it is easy to expose.

Thinking of this, Bai Song didn't stop the car, and drove away directly, and the police watched the car go away and stopped.

"You policemen can't do it", Bai Song teased: "When we saw the police, we drove away, but the police didn't chase them." ”

"Someone knows this car. Liu Shuyuan said nonchalantly.

"Uh..."

Bai Song coughed and drove to a nearby place where no one was around.

"It's right here, it's clean here. Bai Song parked the car.

There are a lot of trees here, and they are one or two hundred meters away from the prison and hospital gates, and the two of them have analyzed the problem well.

"Why don't you take the stairs to confirm?" Liu Shuyuan said, "I don't think it's any danger." ”

"The main thing is that I am afraid of startling the snakes", Bai Song said: "Even if I don't take the stairs, I have a way to confirm the floor." ”

Bai Song looked around and saw that there was no one, and went to the trunk to take out the binoculars.

It's more than 500 meters away from the hospital building in a straight line, and it's very clear to see the windows with a telescope at this distance, especially today when there is no smog.

Soon, Bai Song adjusted his position, looked at it for more than half a minute, and took a deep breath: "It's confirmed." ”

Liu Shuyuan was itchy when he heard this, and hurriedly leaned over.

In the whole field of vision, there is a piece of glass, that is, a piece of the outer curtain glass of the building, the glass is very complete, Liu Shuyuan is not very good at operating this telescope, and he doesn't know how to adjust the horizontal and longitudinal orientation, so he can't help but wonder: "What's the matter?"

"If you look at the lower right corner of this glass, you can faintly see a black mark of three or four centimeters inside, which is very unclear, but it is different. Bai Song reminded.

"Oh oh oh, it's true, but I don't know very well, what is this?" Liu Shuyuan raised his head and looked at Bai Song.

Bai Song didn't speak, opened the back door of Liu Shuyuan, and stretched out his hand into the car: "Can you see my hand like this?"

Liu Shuyuan shook his head: "I can't see it, the ** film of this car is still very good." ”

Bai Song then put his hand on the glass from the inside, and then asked, "Do you think you can see my hand like this?"

"I can see it. Liu Shuyuan seemed to understand something.

"This kind of coated glass is not purely unidirectional glass, the reason why one party can see the other side and the other side cannot see is that the film has different ability to pass through and refract incident light and reflected light. This film is multi-layered, and the refracted light passes through different media, and the real appearance of the inside cannot be seen from the outside. Bai Song explained: "But if you are very close to this glass, there will still be a small amount of reflected light escaping and allowing us to see a seal." ”

"So, what is this seal you are talking about?" Liu Shuyuan understood what Bai Song wanted to express.

"That uncle's ping-pong racket is on the windowsill. Bai Song said lightly: "From here, this table tennis racket is on the 12th floor. ”

Table tennis rackets...

Liu Shuyuan was reminded of this and thought about it.

There are seven or eight people playing in turns at that table tennis table, and if they lose, they will be replaced, and the uncle who won six or seven rounds in a row that the two of them saw loses, and it will take half an hour to think about it, so...

Liu Shuyuan has always felt that he is also very careful, but he is still very shocked, and he can't help but look at Bai Song with some grievances, and he is very sad in his heart.

Liu Shuyuan's growth can be described as smooth, although he has met many cattle people, but most of them are elders and professors, who are older than him, and he can accept it. But Bai Song is still one year younger than him! The most important thing is that in this hospital, Bai Song, like him, came twice, and the two were together the whole time!

Whether it was last time or this time, there are always some commonplace things that can be discovered by Bai Song as clues, but he can't, which makes people quite frustrated.

"What's wrong with you?" Bai Song was a little puzzled, he had already put away the binoculars at this time, "I'll remove your makeup." ”

"I'll do it myself. Liu Shuyuan still knows how to remove makeup, went to the cab, and got makeup remover water and makeup remover cotton from Bai Song.

Master Qiao's makeup and camouflage are not the same as those outside, but the makeup remover is ordinary makeup remover, and the two quickly "removed" the camouflage on their faces.

"Next, find someone to confirm. Bai Song sat in the co-pilot and looked at Liu Shuyuan: "This matter must be under the jurisdiction of the Tianbei Branch." ”

"That's for sure. When Liu Shuyuan heard this, his spirit was not bad: "I'll solve it." ”